<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2007-1132</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias forestales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. forestales]]></abbrev-journal-title>
<issn>2007-1132</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11322021000100088</article-id>
<article-id pub-id-type="doi">10.29298/rmcf.v12i63.762</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estructura y diversidad de un matorral dominado por Helietta parvifolia (A. Gray ex Hemsl.) Benth.]]></article-title>
<article-title xml:lang="en"><![CDATA[Structure and diversity of a Helietta parvifolia (A. Gray ex Hemsl.) Benth.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pequeño Ledezma]]></surname>
<given-names><![CDATA[Miguel Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alanís Rodríguez]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Molina Guerra]]></surname>
<given-names><![CDATA[Víctor M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Collantes-Chávez-Costa]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mora-Olivo]]></surname>
<given-names><![CDATA[Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Nuevo León Facultad de Ciencias Forestales ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,RENAC, S.A. de C.V  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Quintana Roo División de Desarrollo Sustentable ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Tamaulipas Instituto de Ecología Aplicada ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2021</year>
</pub-date>
<volume>12</volume>
<numero>63</numero>
<fpage>88</fpage>
<lpage>113</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11322021000100088&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11322021000100088&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11322021000100088&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Helietta parvifolia es una especie de importancia económica en el norte de México, ya que es una fuente potencial de madera y leña para usos diversos. El objetivo del presente estudio fue evaluar la estructura y diversidad de un matorral maduro de H. parvifolia en el noroeste de México. Se determinó la diversidad de la vegetación mediante el establecimiento de 20 sitios de muestreo de 10 × 10 m cada uno (2 000 m² en total), en donde se registraron las especies, el diámetro normal y de copa de todos los árboles y arbustos con un diámetro &#8805; 3 cm. Se calcularon los índices de Margalef, Shannon y Pretzsch para determinar la riqueza, diversidad de especies y estructura vertical, respectivamente. Se registraron 11 especies arbóreas y arbustivas, distribuidas en nueve géneros y seis familias. Fabaceae fue la que registró un mayor número de taxones (cinco); mientras que las familias restantes presentaron solamente un taxón. Tres especies concentraron 82.59 % de los valores de índice de valor de importancia (IVI): Helietta parvifolia, Cordia boissieri y Havardia pallens, con 53 %, 15.44 % y 14.15 %, respectivamente. La mayor abundancia de individuos de clases diamétricas pequeñas sugiere la existencia de un estado de regeneración activo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Helietta parvifolia is a species of economic importance in Northern Mexico, being a potential source of wood and firewood for several uses. The objective of the study was to evaluate the structure and diversity of a mature H. parvifolia scrub in Northwest Mexico. Vegetation diversity was determined by establishing 20 sampling sites of 10 × 10 m each (2000 m² in total), where the normal and crown diameter of all trees and shrubs with a diameter &#8805; 3 cm were recorded. The Margalef, Shannon and Pretzsch indexes were calculated for richness, species diversity and vertical structure, respectively. Eleven tree and shrub species were found, distributed in nine genera and six families. The Fabaceae family had the highest number of taxa (five), while the remaining families had only one species. Three of them concentrated 82.59 % of the importance value index values (IVI): Helietta parvifolia, Cordia boissieri and Havardia pallens, with 53 %, 15.44 % and 14.15%, respectively. The abundance of individuals of small diameter classes suggests the existence of an active regeneration state.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Diversidad de especies]]></kwd>
<kwd lng="es"><![CDATA[Helietta parvifolia (A. Gray ex Hemsl.) Benth.]]></kwd>
<kwd lng="es"><![CDATA[matorral submontano]]></kwd>
<kwd lng="es"><![CDATA[riqueza de especies]]></kwd>
<kwd lng="es"><![CDATA[vegetación xerófila]]></kwd>
<kwd lng="en"><![CDATA[Species diversity]]></kwd>
<kwd lng="en"><![CDATA[Helietta parvifolia (A. Gray ex Hemsl.) Benth.]]></kwd>
<kwd lng="en"><![CDATA[submontane scrub]]></kwd>
<kwd lng="en"><![CDATA[species richness]]></kwd>
<kwd lng="en"><![CDATA[xerophilous vegetation]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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